What is an “adjustable” sleeping bag? The newest trend is to have sleeping bags that can be configured differently depending on the weather, and the new Adjustable Sleeping Bag by Coleman does just that by using a divided cover with top and bottom flaps that allow campers to change how warm the bag is. So, you can cover just your feet and legs, or just your torso, and you can unzip the divided cover completely so you’re only covered by a lightweight sheet on warm nights. It’s as if you can kick those blankets off when it gets really warm, just like at home.